SCPC - Process Instrumentation and Control 
                  (Strumentazione e Controllo dei Processi Chimici)

                   lecturer prof. Michele MICCIO

Interactive calculations and sizing problems on control valves for liquids

Since February 10, 2009 You are visitor No.

Aggiornato al 27 luglio 2021
(Last updated on July 27, 2021)

 

NOTE:

Examples and Interactive Problems are taken or reworked from Giuseppe Miglino’s Degree Thesis in Chemical Engineering.
They are normally and publicly accessible through any WEB browser thanks to the Mathcad® Calculation Server and without having the Mathcad® software installed on own PC.

 

TABLE OF CONTENTS

Initial interactive exercises

Interactive reference problems for globe valves (GL)

Interactive reference problems for diaphragm valves
 

Interactive reference problems for butterfly valves
Interactive reference problems for modulating ball valves

 

No.

Interactive exercises for initial practice      

WEB
Page

PDF file

0

Non-Interactive calculation of the Flow Coefficient Cv with simple conversion of data units

1

New
Interactive calculation of the Flow Coefficient Cv and units conversion for the data

2

Interactive calculation and plot of the Intrinsic Characteristic

 

3

Cavitation check.
Interactive calculation and plot of the Flow Curve

 

4

Interactive calculation and plot of the Installed Characteristic for a globe valve.

(exam problem of November 12, 2003 - reworking of the 2nd part)

 

 

No.

Interactive reference examples for sizing of globe valves        

WEB
Page

PDF file

a) The manufacturer provides a table containing  Cvn as well as Cv for various values of h

GL-a2

globe valve Fisher-PF51.2HP

 

b) The manufacturer provides Cvn values and a diagram of Φ (or Cv) vs. h

GL-b

globe valve DeZurik-SD1000

 

c) The manufacturer provides the Cvn value only for various DN

GL-c3

globe valve Combraco 57

GL-c3bis

globe valve Samson 3321, first to be sized and then to be checked for liquids differing for density (in Italian )

New
GL-c3bis

globe valve Burkert 2013

 first to be sized,
then to be confirmed for the right choice of  the Intrinsic Characteristic (in a circuit with utility)		 livescript (zipped)

requires -->Matlab on-line: https://it.mathworks.com/products/matlab-online.html
available for UniSA students upon registration at:
https://web.unisa.it/servizi-on-line/matlab-x-unisa

 

No.

Interactive reference exercises or examples for butterlfly valves   

WEB
Page

PDF file

a) The manufacturer provides a table containing  Cvn as well as Cv for various values of θ

F-1.a

Pratt butterfly valve

 

 

No.

Interactive reference exercises or examples for modulating ball valves   

WEB
Page

PDF file

a) The manufacturer provides a table containing  Cvn as well as Cv for various values of θ

S-1

Belimo modulating ball valve